Duplex pumping-engine



5 Sheets-Sheet l.

D. S. EINES.

DUPLEX PUMPING BNGINB.

Ils

Patented Feb. 14, 1882.

(No Model.) 5Sheets-Sheet 3,

D. S. EINES.

- DUPLEX PUMP-ING ENGINE. l

No. 253.604. Patented Feb. 14.1882.

nml immuni (No Model.) 4 5 Sheets-Sheet 4.

D. lS. EINES.

v DUPLEX PUMPING ENGINE. No. 253,604. Patented Feb. 14,1882.

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N. FEYERS. Phomuxhognphar. wnshingmn. D. c.;

5 Sheets-Sheet 5 (No Model.)

D. S. EINES. DUPLEX PUMPING ENGINE.

' Patented Feb. 14,1882'.

UNITED STATES.

PATENT OEEIOE.

DAUPHIN s. HINEs, O F BROOKLYN, NEW YORK.

DUPLEX PUMPlNG-ENGINE.

SPECIFICATION forming part of Letters Patent No. 253,604, dated February14, 1882.

i Application filed September 15, 1881. (No model.)

To all fwhom it may concern:

Beit-known that I, DAUPniN S. HiNEs, a citizen .-.of the `United States,residing in the city of Brooklyn, county ot Kings, and State of NewYork, have invented certain new and` useful Improvements in DuplexPumping-Engines, fully described and represented in thefollowingspecitication and the accompanying4 drawin gs,formin g a partof the same.

In said drawings, Figure l is a yplan view ofy a two cylinder duplexhigh pressure engine containing my invention. Fig. 2 is a verticallongitudinal. section of one of the cylinders with `ports and valves,taken on the line x of Fig. l, with the` parts for moving the valvesiinelevation. inder compound duplex engine containingmy invention. sectionof two of said cylinders, showing the ports and valves, taken on theline y y of Fig. 3, themeansfor operating thevalves being shown inelevation. Fig. 5 is a longitudinal section of a cylinder with ports andvalves,

the means for operating the latter being shown pressure by the operationof the throttle and induction `valves while the piston is in motion butwhen its speed is cheeked and it pauses during the reversal of thestroke for a brief interval of time the pressure in the cylinder risesuntilunder certain circumstances, it-approximates closely to theboiler-pressure, and,y

may be exhausted perhaps at one hundred pounds to the square inch whenthe effective workingpressure does not exceed eighty pounds.

:The object ot' m yinven tion is to prevent such increase of thepressure upon the piston at the closeof the stroke 5 and it consists,ina duplex:

Fig. 3 isa plan view of a four-cyl- Fig. 4 is a vertical longitudinalipumping-engine, ofthecombination, with each induction-port of thehigh-pressure steam cylinder or cylinders, ot' an intermediate valveoperated to close such port during the pause on the-reversal of thepiston.

It also` consists in other combinations of parts, hereinafter-fullydescribed and claimed.

Iuthe drawings I have shown three modes of carryingv out my invention,one shown in Figs. 1 and 2, the secondin Figs..3 and 4, and the third inFig. 5, the second and third being modifications of the lirst.

In these drawings, l 1 are the high-pressure steam-cylinders. 2'2larethe steam-chests, each containing main distributing steam-valve of Dform.

3 3 are-the piston-rods, having pistons working inthe cylinders 1 1',respectively. Each piston-redis connected to a pump-plunger in theordinaryv and wellknown way in duplex pumping-engines.

4 is alrock'er-arm connected to a suitablyjonrnaledshaft, 5', which',through a crank on itscnd and aconnecting rod', 6, operates the D-shapedvalve in the steam -chest 2 of the cylinder l', the rocker-armv 4 beingmoved by a pinfsecured to the .piston-rod 3l and working in a slot inits end.

4 is also a rocker-'arm secured to a.v properlyjournaledv shaft, 5,which in turn has-a crank on its end connected by a rod, 6', with a D-sliapedvalve in the steam-chest 2 of theeylinder l', and is operated vbya pin on the piston-rod 3 engaging the slot inthe end of the rocker-armv4. This .is the well-known form of the Worthington duplex engine, andneeds no further description to enable those skilledvin the art tounderstand the same and how it operates. a

Each high-pressure. steam-cylinder is provided with induction-ports 7 8,leading from the steam-chest to the cylinder at either end, whichconveythe live steam to the high-pressure cylinder to workthe piston therein.These ports are opened and closed by the D-shaped valvein the.well-known, manner. Gontrollin g the induction-ports?v 8areintermediate valves, 9.10, one for each port. As shown in Figs. l and2, theseV valves are rotary ones extending across the yport'trom side-toside, and provided bar 15 belonging to the cylinder 1' is reciprocatedby means of a crank, 18', secured to the shaft and a connecting-rod,19', While the bar with which the cylinder 1 is provided is operated bya crank, 18, secured to the shaft 5 and the connecting-rod 19. Thecranks 12 and 14 are provided with springs 20 21, secured to a commonstud, 22, which springs operate to rotate the valves9 and 10, so thatthe t passages 53 54 may coincide with the ports 7 8 at the proper time,any convenient stop being applied to each valve to prevent it fromturning too far underthepressure of its spring. At the time the pistonin the high-pressure cylinder 1' comes to a pause, asis usual intheWorthington duplex .pumping-engines, at the left-hand end ofthecylinder, as shown in Fig. 2, through the operation of the rocker-arm4', shaft 5', crank 18', and connecting-rod 19', the set-screw 17 hasstruck the pin on the' crank 13 and turned the valve 10 into a positionto close the induction -port- 8, and thus cut o communication betweenthe steam-chest and the cylinder. Upon the return movement of thepiston, the bar 15 beingcagain moved by the instrumentalities described,the adjustingscrew 17, moving away from the pin on thev crank-arm 13,permits the spring 21 to rotate the valve until its passage 54 coincideswith the induction-port 8, and when the piston arrives atthe end of itsreturn-stroke and pauses, the bar 15 will have been ,moved so that itsset-screw 16 will have come iu contact with the pin on the crank ll, andwill have rotated the valve 9 and closed the induction-port 7. Upon thereturn ot' the piston the valve 9 is again opened.

By means of the adjusting-screws 16 and 17 the point ofcontact ofthepins with the cranks 11 and 13 may be regulated, so that theintermediate valves inay be closed at the proper time and remain closedas long as may be required.

Itis obvious that the intermediate valves of the cylinder l will beoperated in the same way and produce the same effect as those lielongingto the cylinder 1l through the instrumentality ofthe rocker-arm 4, shaft5, crank 18, and connecting-rod 19.

As shown in. Figs. 3 and 4, theintermediate valves, 9 10, are ot' puppetform, operating in chambers communicating with the respective ports 7and 8. These puppet-valves areot the well-known form, having stemsguided in spiders, and each provided with a collar which operates inconnection with a slotted' link or swivel, 24. Each link 24 is at itsupper end provided with a screw-thread engaging with a nut, 25, which inturn is swiveled upon a stem, 26, connectedy to one lever of abellcrank, the other lever being connected to a rod, 30'. The rod 30' ispivoted to a crankarm, 3L', secured to the shaft 5', operated by therocker-arm 4' vthrough the pin on the piston-rod-3. The connecting-rod30, belonging to the high-pressure cylinder 1, is in turn pivoted to thebell-cranks to which the stems 26 are connected, and is actuated by acrank, 31,

Von the shaft 5, to which it is pivoted. When the piston of thehigh-pressure cylinder 1' pauses at the end of its stroke at theleft-hand end of the cylinder, as shown in Fig. 4, the

puppet-valve 10 will be permitted,through the operating mechanism justdescribed, to seat itself' by gravity, and thus close the port 8 andprevent the ingress of thelive steam throughit. Upon the piston of saidcylinder reaching the other end ot' its stroke the intermediate -valvel() is raised through the connecting mechanism described, while thevalve 9 is allowed to descend and seat itself by the force ot' gravity,

and thus close the induction-port 7. Upon the return ot' the piston thevalve 9 is again raised to permit the passage of live steam.

By means of the nut 25 the opening andv closing of the intermediatevalves in relation to the movement of the pistons may be regulated.

Itis obvious that the intermediate valves,

9 10, of the cylinder 1 will be operated in the same way and produce thesame effect, through the instrumentality ot' the crank 3L on the shaft5, connecting-rod 30, and the bell-crank levers, as those with which thecylinder 1' is provided.

As shown in Fig. 5, the intermediate valves, 9 10, are rotating ones,extending across the induction-ports 7 8 in a chamber .provided forthem. .The intermediate valve 9 is provided with a crank, 27, and theintermediate valve 1() with a crank, 28, both being on the outside'ofthe cylinder. The crank 27 is pivoted to a weighted rod, 32, and thecrank 28 to a weighted rod, 33, these rods resting in their normalposition upon supports placed beneath their weights, as shown in thedrawings, and serve to keep the intermediate valves, 9 and 10, in aposition with their passages coinciding with the ports 7 and 8,respectively, so that live steam, when allowed to enter theinduction-ports 7 and 8, may pass into the cylinder unobstructed. 'lhecrank 27 has also pivoted to it a rod, 34, having a slotted extension,35, in which a box, 36, provided with an adjustingscrew, 37, Works, thisadjustingscrew in the operation of the mechanism coming against theupper end of the slot in the extension. The crank 28 is provided with asimilar rod, 38, having a similar extension, 39, and similar box, 40,and adjusting-screw 41. E Pivoted to shaft 42 are three levers, 43

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Y 44 45. The Iever 43 is connected by a wristpin with the box 36, andthe lever 44 with the box 40, while the lever 45, through a rod, 46, isconnected to a crank, 47,onashaft, 48, which receives vibratingmotionthrough the lever 49, receiving motion from some moving parts of theengine or pump. When the piston of the cylinder pauses at the end of thestroke at the right-hand end of the cylinder shown in Fig. 5,through themovement of the lever 49, shaft 48, crank 47, lever 45, lever 43, andconnecting-rod 46, the box 36, with its set-screw 37, is caused to riseuntil the latter strikes the upper end of the. slotted extension of therod 34, which, through the crank 27, rotates the valve 9 until it closesthe induction-port 7, thus preventing steam from entering that end ofthe cylinder. As soon as the pistou starts upon its return-strokethelever 43 is lowered through the instrumen talities that raised it,which permits the weighted rod 32 to return the valve to a positionwhere the induction-port 7 will be open for the passage of live steam.As soon as the piston reaches the end of its returnstroke and pauses atthe left-hand end of the cylinder shown in- Fig. 5 the lever 44, throughthe instrumentalities before described for working the lever 44, will bein turn raised, and with it the box and set-screw 41, which latter,coming in contact with the upper end of the slotted extension of the rod33, will raise the lever 28., and through it cause the valve 10 torotate and close the port 8. As soon as the piston begins to returnagain the lever 44 will be lowered through the instrumentalities thatraised it, which permits the Weigh ted rod 33 to cause the valve 10 toreturn to the position shown in the drawings, where the port 8 is openfor the passage for live steam.

It is obvious that each high-pressure cylinderis to be provided with themechanism shown in Fig. 5 for operating the valves 9 and 10.

By means ofthe adjusting-screws 37 and 41 the point ot' contact with thebottom of the slotted extension of the rods 34 33 may be regulated, sothat the intermediate valves maybe lclosed at the proper time and remainclosed as long as may be required.

The slots of the bars 15, as shown in Figs. 1 and 2, and ofthe swivels24, as shown in Figs. 3 and,4, and of the rods 34 3S, as shown in Fig.

t 5, permit of the constant movement of thentermediate mechanism thatoperates the valves 9 and 10, and yet allows such mechanism to operatethe valves at the proper time.

In Figs. 2, 4, and 5 exhaust-ports 50 51 are shown,which also permit acushion to be formed behind the piston as it nears the end of itsstroke.

Where the duplex pumping-engine is composed of one high and one lowpressure cylinder, with a tank or not between them, my invention isapplied to the high -pressure cylinder.

Having thus described my invention, what Iclaim as ne\v,and desire tosecure by Letters Patent, is-

1. In a duplex pumping-engine in which the main steam-valve of oneengine is operated by the other engine, the combination, with eachinduction-port ofthe high-pressure steam' cylinder or cylinders, of anintermediate valve operated to close such port during the pause on thereversal of the movement ol' the piston, substantially as described.

2. In aduplex pumping-engine in which the main steam-valve ofone engineis operated by the other engine, the combination, with eachinduction-port of the high-pressure steam cylinder or cylinders, of anintermediate valve and mechanism for operating the same, substantiallyas described.

3. In a duplex pumping-engine in which the main steamvalve of one engineis operated by the other engine, the combination, with eachvinduction-port of the high-pressure steam cylinder or cylinders, of auintermediate valve, with mechanism-for operating the same, provided withmeans for adjusting the opening and closing of the same, substantiallyas described.

4. In a duplex pumping-engine in which the IOO

